CECS 341 Exam 1 | Questions with 100% Correct Answers

CECS 341 Exam 1 | Questions with 100% Correct Answers A computer in an Amazon building accessed by thousands of people for online shopping. a. Embedded b. Server c. PC A terabyte is one _____ bytes. a. Thousand b. Million c. Billion d. Trillion The collection of software on a computer that provides services to application software. a. System software b. Application software c. Compiler The ISA includes anything programmers need to know to make a binary machine language program work correctly, including instructions, I/O devices, and so on. a. True b. False "Bit" is short for "binary digit." a. True b. False Computers use binary because binary is more powerful than decimal numbers. a. True b. False Operating system and compiler are central to every computer system. a. True b. False Although binary's alphabet contains only two "letters", 0 and 1, the binary alphabet can represent as much information as the English alphabet's 26 letters. a. True b. False The number 12 can be represented in binary as 1100. If a computer's memory location contains , then that location contains the number 12. a. True b. False The corresponding binary representation of number 5C in hexadecimal is ___. a. b. c. d. An advantage of a high-level language (HLL) is allowing a programmer to ________ a. Think more naturally b. Think like a machine The following could be an assembly language instruction: . a. True b. False Computer A requires 10 seconds to compress a file. Computer B requires 5 seconds. Which computer has the higher performance? a. A b. B Computer A: 2GHz, 10s CPU time. In order to design a computer B with 6s CPU time and 2.4 times clock cycles (CPI) of computer A assuming both use the same amount of instruction count, how fast must computer B clock be? a. 2 GHz b. 4 GHz c. 6 GHz d. 8 GHz e. None of above To determine how many times faster Computer C is than Computer D, which is the correct calculation? a. PerfC / PerfD b. PerfD / PerfC A given application written in Java runs 15 seconds on a desktop processor. A new Java compiler is released that requires only 0.6 as many instructions as the old compiler. Unfortunately, it increases the CPI by 1.1. How fast can we expect the application to run using this new compiler? a. 15x 0.6 /1.1 = 8.2 sec 3 b. 15 x 0.6 x 1.1 = 9.9 sec c. 15 x 1.1 / 0.6 = 27.5 sec Replacing a processor in a computer with a faster processor has what effect? a. Decreases response time b. Increases throughput c. Both (decreases response time and increases throughput) As clock rates increased in early Intel processors, power _____. a. Increased b. Decreased Which improvement has a bigger impact on power? a. 25% reduction in voltage b. 25% reduction in frequency switching Instructions, as well as data, can be stored in memory as numbers. a. True b. False Multiple operations are allowed per MIPS instruction a. True b. False The alignment restriction refers to that words must start at addresses that are multiple of 4 in MIPS a. True b. False Since registers are faster to access than memory, the compiler should keep all used variables in registers a. True b. False rt is always referred as the second source register for MIPS instruction. a. True b. False Indicate whether name $t9 refers to a MIPS register. a. True b. False Indicate whether name $one refers to a MIPS register a. True b. False Indicate whether name Memory[0] refers to a MIPS register. a. True b. False Indicate whether addi $s1, $s3, 50 is a valid MIPS instruction. a. True b. False Indicate whether lw $s1, 20($s8) is a valid MIPS instruction. a. True b. False More registers may benefit an assembly program, but may directly lead to a _____ clock frequency. a. Faster b. Same c. Slower d. Broken Assume $s3 has 5000, and words addressed 5000..5002 have the data shown: 5000: 99 5001: 77 5002: 323 What address will be computed by lw $t0, 2($s3): a. 5000 b. 5001 c. 5002 Assume $s3 has 5000, and words addressed 5000..5002 have the data shown: 5000: 99 5001: 77 5002: 323 Assume $s2 has 5001. What value will be put in $t2 by lw $t2, 1($s2)? a. 323 b. 99 c. 77 d. 88 Consider the 32-bit binary number , stored in the word with address 5000. For a big-endian architecture, what value is stored in byte 5003? a. b. c. d. Consider the 32-bit binary number , stored in the word with address 5000. For a big-endian architecture, what value is stored in byte 5001? a. b. c. d. Consider the 32-bit binary number , stored in the word with address 5000. For a little-endian architecture, what value is stored in byte 5001? a. 5 b. c. d. If $s3 has 900, $t0 has 77, and memory locations 900, 904, and 908 have 10, 15, 20 respectively, what does location 904 have after the following instruction? sw $t0, 8($s3) a. 10 b. 15 c. 20 d. 77 Given the following 32-bit number, what is the most significant bit's value? a. 0 b. 1 In two's complement, is the following number positive or negative? a. Positive b. Negative Knowing that 231 is 2,147,483,648, what is the base ten value of the following two's complement number? a. 0 b. -1